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22 July 2024
Arizona’s efforts to mitigate animal-vehicle collisions are set to receive a significant boost with the allocation of $24 million for the construction of nearly 17 miles of wildlife fencing along Interstate 17. This initiative, funded through the bipartisan infrastructure law of 2021, aims to enhance safety on the roads with wildlife crossings while safeguarding wildlife populations.
Ben Goldfarb, an environmental journalist and author of “Crossings: How Road Ecology is Shaping the Future of our Planet,” has extensively studied the impact of roads on ecosystems. In a recent interview, he highlighted the critical role of wildlife crossings in promoting habitat connectivity and reducing the risk of animal-vehicle collisions.
Goldfarb’s fascination with road ecology began over a decade ago in Montana, where he witnessed firsthand the obstacles highways posed to animal movements. The introduction of wildlife overpasses, designed to allow species like elk and moose to traverse highways safely, left a profound impression. These structures not only facilitate safer crossings but also symbolize human efforts to coexist harmoniously with wildlife.
In Arizona, these crossings have proven remarkably effective, particularly along Highway 260, where underpasses with accompanying fences guide elk safely across the road. These measures have reduced elk collisions by approximately 90%, underscoring their efficacy in preventing costly and hazardous accidents.
While wildlife crossings can entail substantial upfront costs, they often prove cost-effective in the long run. The average cost of vehicle repairs, medical bills, and other expenses resulting from collisions with large animals far exceeds the initial investment in building crossings and fencing. Moreover, these initiatives contribute to preserving biodiversity and protecting natural habitats from the fragmentation caused by roads.
Beyond reducing collisions, wildlife crossings facilitate the natural movements of animals across landscapes, crucial for accessing food, shelter, and breeding grounds. In states like Wyoming and Colorado, where highways disrupt vital migration routes, wildlife crossings are essential for ensuring the survival of species like mule deer and elk during harsh winter conditions.
Designing crossings that cater to multiple species remains a challenge. While structures like underpasses are utilized by various wildlife, including deer, mountain lions, and bobcats, each species requires specific habitat features to encourage usage.
Creating wildlife crossings involves more than just construction; it requires designing structures that appeal to animal instincts. Fences play a crucial role in guiding animals towards safe passages, illustrating how thoughtful planning can enhance the effectiveness of these conservation efforts over time.
As efforts to expand wildlife crossings continue, challenges persist, particularly concerning smaller species like amphibians and reptiles, for whom dedicated crossings are less common. Public perception and funding limitations also pose hurdles, as some question the allocation of resources for protecting species that are less visibly impacted by roadways.
Ultimately, the success of wildlife crossings hinges on collaboration between policymakers, engineers, conservationists, and local communities. By integrating ecological considerations into infrastructure planning, Arizona and other states can set a precedent for sustainable development that prioritizes both human safety and wildlife conservation.
Arizona’s investment in wildlife crossings exemplifies a proactive approach to mitigating environmental impacts while fostering safer roadways for all. As awareness grows and technologies evolve, these crossings promise to play an increasingly vital role in preserving the biodiversity and ecological health of our planet.
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